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# dftmtx() - Signal Processing

### Syntax

### Example

### Output / Return Value

### Limitations

### Alternatives / See Also

### Reference

A discrete Fourier transform matrix is a complex matrix of values around the unit circle whose matrix product with a vector computes the discrete Fourier transform of the vector.A = dftmtx(n) returns the n-by-n complex matrix, A, that, when multiplied into a length-n column vector, x, computes the discrete Fourier transform of x. In other words, y = A*x is the same as y = fft(x).The inverse discrete Fourier transform matrix isAi = conj(dftmtx(n))/n

A = dftmtx(n)

Ai = conj(dftmtx(n))/n